*{
				margin:0;
				padding:0;
				list-style:none;
			}
			.cliearfix{
				content:"";
				display:block;
				clear:both;
			}
			input{
				width:40px;
				height:30px;
				background: darkgray;
				border: none;
			}
			#box{
				width:200px;
				height:200px;
				border:1px solid red;
				text-align: center;
				margin: 0 auto;
			}
			
			.oul{
				width:200px;
				height:100px;
				overflow: hidden;
			}
			.oul>li{
				width:200px;
				height:100px;
				text-align: center;
				line-height:90px;
				display: none;
			}
			.active{
				background:red;
				color:white;
			}
			.show{
				display:block!important;
			}